aw ##ii ##l i and his heir yi ##k ' in chan k ' aw ##ii ##l continued hostilities against cal ##ak ##mu ##l and its allies and imposed firm regional control over the area around ti ##kal , extending as far as the territory around lake pete ##n it ##za . these two rulers were responsible for much of the impressive architecture visible today . in 73 ##8 , qui ##ri ##gua , a vassal of copa ##n , ti ##kal ' s key ally in the south , switched allegiance to cal ##ak ##mu ##l , defeated copa ##n and gained its own independence . it appears that this was a conscious effort on the part of cal ##ak ##mu ##l to bring about the collapse
awiil i and his heir yik'in chan k'awiil continued hostilities against calakmul and its allies and imposed firm regional control over the area around tikal, extending as far as the territory around lake peten itza. these two rulers were responsible for much of the impressive architecture visible today. in 738, quirigua, a vassal of copan, tikal's key ally in the south, switched allegiance to calakmul, defeated copan and gained its own independence. it appears that this was a conscious effort on the part of calakmul to bring about the collapse